> ## Documentation Index
> Fetch the complete documentation index at: https://apidoc.cufinder.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Reverse Email Lookup API
> Email addresses hide complete professional profiles that marketing and sales teams need for personalization. The [Reverse Email Lookup](https://cufinder.io/enrichment-engine/reverse-email-lookup) API transforms email addresses into detailed person and company data—including full name, job title, LinkedIn, employer, and location—with 98% confidence scores. Built for developers creating identity resolution and lead validation tools, this RESTful endpoint delivers comprehensive contact profiles that power email verification, account enrichment, and prospect intelligence workflows across your sales stack.
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## Common Use Cases
An email address on its own says little until you know who is actually behind it.
* **Lead Capture:** Identifying the person behind an inbound email address.
* **CRM Enrichment:** Turning a bare email into a full contact record.
* **Verification:** Checking who is really behind a signup.
* **Sales Research:** Learning who you are talking to before you reply.
* **Data Enrichment:** Backfilling names and roles from email addresses.
Credit usage is 4 per record found.
## Attributes
Email address
## Response
```json Response theme={null}
{
"status": 1,
"data": {
"confidence_level": 98,
"query": "iain.mckenzie@stripe.com",
"person": {
"first_name": "iain",
"last_name": "mckenzie",
"full_name": "iain mckenzie",
"linkedin_url": "linkedin.com/in/iain-mckenzie",
"summary": null,
"followers_count": 0,
"facebook": null,
"twitter": null,
"avatar": "media.cufinder.io/person_profile/iain-mckenzie",
"country": "canada",
"state": null,
"city": null,
"job_title": "engineering",
"job_title_categories": [],
"company_name": "stripe",
"company_linkedin": "linkedin.com/company/stripe",
"company_website": "https://stripe.com",
"company_size": "1,001-5,000",
"company_industry": "technology, information and internet",
"company_facebook": "facebook.com/stripepayments",
"company_twitter": "twitter.com/stripe",
"company_country": "united states",
"company_state": "california",
"company_city": "south san francisco"
},
"credit_count": 9781
}
}
```
## Reverse Email Lookup API Typescript SDK
```typescript Request theme={null}
import { Cufinder } from '@cufinder/cufinder-ts';
// Initialize the client
const client = new Cufinder('your-api-key-here');
// Initialize with more options
const client = new Cufinder('your-api-key-here', { timeout: 60000 });
const result = await client.rel('iain.mckenzie@stripe.com');
console.log(result);
```
## Reverse Email Lookup API Python SDK
```python Request theme={null}
from cufinder import Cufinder
# Initialize the client
client = Cufinder('your-api-key-here')
# Initialize with more options
client = Cufinder('your-api-key-here', timeout=60)
result = client.rel('iain.mckenzie@stripe.com')
print(result)
```
## Reverse Email Lookup API Go SDK
```go Request theme={null}
package main
import (
"fmt"
"log"
"github.com/cufinder/cufinder-go"
)
func main() {
// Initialize the client
sdk := cufinder.NewSDK("your-api-key-here")
// Initialize with more options
sdk := cufinder.NewSDKWithConfig(cufinder.ClientConfig{
APIKey: "your-api-key-here",
BaseURL: "https://api.cufinder.io/v2",
Timeout: 60 * time.Second,
MaxRetries: 3,
})
}
result, err := sdk.REL("iain.mckenzie@stripe.com")
if err != nil {
log.Fatal(err)
}
fmt.Println(result)
```
## Reverse Email Lookup API Ruby SDK
```ruby Request theme={null}
require 'cufinder_ruby'
# Initialize the client
client = Cufinder::Client.new(api_key: 'your-api-key-here')
# Initialize with more options
client = Cufinder::Client.new(
api_key: 'your-api-key-here',
timeout: 60,
max_retries: 3
)
result = client.rel(email: 'iain.mckenzie@stripe.com')
puts result
```
## Reverse Email Lookup API Rust SDK
```rust Request theme={null}
use cufinder_rust::CufinderSDK;
#[tokio::main]
async fn main() -> Result<(), Box> {
// Initialize the client
let sdk = CufinderSDK::new("your-api-key-here".to_string())?;
// Initialize with more options
let sdk = CufinderSDK::with_config(ClientConfig {
api_key: "your-api-key-here".to_string(),
base_url: "https://api.cufinder.io/v2".to_string(),
timeout: Duration::from_secs(60),
max_retries: 3,
})?;
Ok(())
}
let result = sdk.rel("iain.mckenzie@stripe.com").await?;
println!("{:?}", result);
```
## Reverse Email Lookup API Rust SDK
```rust Request theme={null}
use cufinder_rust::CufinderSDK;
#[tokio::main]
async fn main() -> Result<(), Box> {
// Initialize the client
let sdk = CufinderSDK::new("your-api-key-here".to_string())?;
// Initialize with more options
let sdk = CufinderSDK::with_config(ClientConfig {
api_key: "your-api-key-here".to_string(),
base_url: "https://api.cufinder.io/v2".to_string(),
timeout: Duration::from_secs(60),
max_retries: 3,
})?;
Ok(())
}
let result = sdk.rel("iain.mckenzie@stripe.com").await?;
println!("{:?}", result);
```
## Related APIs
Enrich a person with full contact data.
Find an email from a LinkedIn profile.
Enrich a person from their LinkedIn profile.
Search 1B+ profiles with combined filters.